Measurement reporting with delta values

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam. The UE may receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam. The UE may transmit, to the first TRP or the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. Numerous other aspects are described.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application claims priority to U.S. Provisional Patent Application No. 63/261,136, filed on Sep. 13, 2021, entitled “MEASUREMENT REPORTING WITH DELTA VALUES,” and assigned to the assignee hereof. The disclosure of the prior application is considered part of and is incorporated by reference into this patent application.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for measurement reporting with delta values.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

A wireless network may include one or more base stations that support communication for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink communications and uplink communications. “Downlink” (or “DL”) refers to a communication link from the base station to the UE, and “uplink” (or “UL”) refers to a communication link from the UE to the base station.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and/or global level. New Radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

SUMMARY

In some implementations, an apparatus for wireless communication at a user equipment (UE) includes a memory and one or more processors, coupled to the memory, configured to: receive, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.

In some implementations, an apparatus for wireless communication at a first TRP includes a memory and one or more processors, coupled to the memory, configured to: transmit, to a UE, a first CSI-RS associated with the first TRP and a first beam; and receive, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.

In some implementations, a method of wireless communication performed by a UE includes receiving, from a first TRP, a first CSI-RS associated with the first TRP and a first beam; receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmitting, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.

In some implementations, a method of wireless communication performed by a first TRP includes transmitting, to a UE, a first CSI-RS associated with the first TRP and a first beam; and receiving, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.

In some implementations, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive, from a first TRP, a first CSI-RS associated with the first TRP and a first beam; receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.

In some implementations, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of an first TRP, cause the first TRP to: transmit, to a UE, a first CSI-RS associated with the first TRP and a first beam; and receive, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.

In some implementations, an apparatus for wireless communication includes means for receiving, from a first TRP, a first CSI-RS associated with the first TRP and a first beam; means for receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and means for transmitting, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.

In some implementations, a first apparatus for wireless communication includes means for transmitting, to a UE, a first CSI-RS associated with the first apparatus and a first beam; and means for receiving, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first apparatus or a second apparatus, and the second CSI-RS is associated with a second beam.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, TRP, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

While aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios. Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and/or packaging arrangements. For example, some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, and/or artificial intelligence devices). Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and/or system-level components. Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and/or summers). It is intended that aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, and/or end-user devices of varying size, shape, and constitution.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

FIG. 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.

FIG. 2 is a diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.

FIG. 3 is a diagram illustrating an example of a channel state information (CSI) reporting framework, in accordance with the present disclosure.

FIG. 4 is a diagram illustrating an example associated with measurement reporting with delta values, in accordance with the present disclosure.

FIGS. 5-6 are diagrams illustrating example processes associated with measurement reporting with delta values, in accordance with the present disclosure.

FIGS. 7-8 are diagrams of example apparatuses for wireless communication, in accordance with the present disclosure.

FIG. 9 is a diagram illustrating an example of a disaggregated base station architecture, in accordance with the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, or the like (collectively referred to as “elements”). These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

While aspects may be described herein using terminology commonly associated with a 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).

FIG. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and/or a 4G (e.g., Long Term Evolution (LTE)) network, among other examples. The wireless network 100 may include one or more base stations 110 (shown as a BS 110 a, a BS 110 b, a BS 110 c, and a BS 110 d), a user equipment (UE) 120 or multiple UEs 120 (shown as a UE 120 a, a UE 120 b, a UE 120 c, a UE 120 d, and a UE 120 e), and/or other network entities. A base station 110 is an entity that communicates with UEs 120. A base station 110 (sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and/or a transmission reception point (TRP). Each base station 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term “cell” can refer to a coverage area of a base station 110 and/or a base station subsystem serving this coverage area, depending on the context in which the term is used.

A base station 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having association with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A base station 110 for a macro cell may be referred to as a macro base station. A base station 110 for a pico cell may be referred to as a pico base station. A base station 110 for a femto cell may be referred to as a femto base station or an in-home base station. In the example shown in FIG. 1 , the BS 110 a may be a macro base station for a macro cell 102 a, the BS 110 b may be a pico base station for a pico cell 102 b, and the BS 110 c may be a femto base station for a femto cell 102 c. A base station may support one or multiple (e.g., three) cells.

In some aspects, the term “base station” (e.g., the base station 110) or “network entity” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, and/or one or more components thereof. For example, in some aspects, “base station” or “network entity” may refer to a central unit (CU), a distributed unit (DU), a radio unit (RU), a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC), or a Non-Real Time (Non-RT) RIC, or a combination thereof. In some aspects, the term “base station” or “network entity” may refer to one device configured to perform one or more functions, such as those described herein in connection with the base station 110. In some aspects, the term “base station” or “network entity” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a number of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the term “base station” or “network entity” may refer to any one or more of those different devices. In some aspects, the term “base station” or “network entity” may refer to one or more virtual base stations and/or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term “base station” or “network entity” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.

In some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a base station 110 that is mobile (e.g., a mobile base station). In some examples, the base stations 110 may be interconnected to one another and/or to one or more other base stations 110 or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a base station 110 or a UE 120) and send a transmission of the data to a downstream station (e.g., a UE 120 or a base station 110). A relay station may be a UE 120 that can relay transmissions for other UEs 120. In the example shown in FIG. 1 , the BS 110 d (e.g., a relay base station) may communicate with the BS 110 a (e.g., a macro base station) and the UE 120 d in order to facilitate communication between the BS 110 a and the UE 120 d. A base station 110 that relays communications may be referred to as a relay station, a relay base station, a relay, or the like.

The wireless network 100 may be a heterogeneous network that includes base stations 110 of different types, such as macro base stations, pico base stations, femto base stations, relay base stations, or the like. These different types of base stations 110 may have different transmit power levels, different coverage areas, and/or different impacts on interference in the wireless network 100. For example, macro base stations may have a high transmit power level (e.g., 5 to 40 watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (e.g., 0.1 to 2 watts).

A network controller 130 may couple to or communicate with a set of base stations 110 and may provide coordination and control for these base stations 110. The network controller 130 may communicate with the base stations 110 via a backhaul communication link. The base stations 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.

The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. A UE 120 may include, for example, an access terminal, a terminal, a mobile station, and/or a subscriber unit. A UE 120 may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and/or a satellite radio), a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, and/or any other suitable device that is configured to communicate via a wireless medium.

Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE and/or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and/or a location tag, that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered a Customer Premises Equipment. A UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and/or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.

In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology, an air interface, or the like. A frequency may be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

In some examples, two or more UEs 120 (e.g., shown as UE 120 a and UE 120 e) may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another). For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and/or a mesh network. In such examples, a UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.

Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. For example, devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.

The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz-24.25 GHz). Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300 GHz). Each of these higher frequency bands falls within the EHF band.

With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and/or FR5) may be modified, and techniques described herein are applicable to those modified frequency ranges.

In some aspects, a UE (e.g., UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive, from a first TRP, a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.

In some aspects, a first TRP (e.g., base station 110) may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may transmit, to a UE, a first CSI-RS associated with the first TRP and a first beam; and receive, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.

As indicated above, FIG. 1 is provided as an example. Other examples may differ from what is described with regard to FIG. 1 .

FIG. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure. The base station 110 may be equipped with a set of antennas 234 a through 234 t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252 a through 252 r, such as R antennas (R≥1).

At the base station 110, a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120). The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE 120. The base station 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS(s) selected for the UE 120 and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), shown as modems 232 a through 232 t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 may further use a respective modulator component to process (e.g., convert to analog, amplify, filter, and/or upconvert) the output sample stream to obtain a downlink signal. The modems 232 a through 232 t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas), shown as antennas 234 a through 234 t.

At the UE 120, a set of antennas 252 (shown as antennas 252 a through 252 r) may receive the downlink signals from the base station 110 and/or other base stations 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems), shown as modems 254 a through 254 r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and/or digitize) a received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller/processor 280. The term “controller/processor” may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI parameter, among other examples. In some examples, one or more components of the UE 120 may be included in a housing 284.

The network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

One or more antennas (e.g., antennas 234 a through 234 t and/or antennas 252 a through 252 r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and/or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and/or one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of FIG. 2 .

On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from the controller/processor 280. The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modems 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna(s) 252, the modem(s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and/or the TX MIMO processor 266. The transceiver may be used by a processor (e.g., the controller/processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to FIGS. 4-8 ).

At the base station 110, the uplink signals from UE 120 and/or other UEs may be received by the antennas 234, processed by the modem 232 (e.g., a demodulator component, shown as DEMOD, of the modem 232), detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller/processor 240. The base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and/or uplink communications. In some examples, the modem 232 of the base station 110 may include a modulator and a demodulator. In some examples, the base station 110 includes a transceiver. The transceiver may include any combination of the antenna(s) 234, the modem(s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and/or the TX MIMO processor 230. The transceiver may be used by a processor (e.g., the controller/processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to FIGS. 4-8 ).

The controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, and/or any other component(s) of FIG. 2 may perform one or more techniques associated with measurement reporting with delta values, as described in more detail elsewhere herein. In some aspects, the first TRP and/or the second TRP described herein is the base station 110, is included in the base station 110, or includes one or more components of the base station 110 shown in FIG. 2 . For example, the controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, and/or any other component(s) of FIG. 2 may perform or direct operations of, for example, process 500 of FIG. 5 , process 600 of FIG. 6 , and/or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some examples, the memory 242 and/or the memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 500 of FIG. 5 , process 600 of FIG. 6 , and/or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.

In some aspects, a UE (e.g., UE 120) includes means for receiving, from a first TRP, a first CSI-RS associated with the first TRP and a first beam; means for receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and/or means for transmitting, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller/processor 280, or memory 282.

In some aspects, a first TRP (e.g., base station 110) includes means for transmitting, to a UE, a first CSI-RS associated with the first TRP and a first beam; and/or means for receiving, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam. The means for the first TRP to perform operations described herein may include, for example, one or more of communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, or scheduler 246.

While blocks in FIG. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of the controller/processor 280.

As indicated above, FIG. 2 is provided as an example. Other examples may differ from what is described with regard to FIG. 2 .

FIG. 3 is a diagram illustrating an example 300 of a CSI reporting framework, in accordance with the present disclosure.

As shown in FIG. 3 , in a multi-TRP configuration, a first TRP may transmit, to a UE, a first CSI-RS via a first beam. The first TRP may transmit, to the UE, a second CSI-RS via a second beam. The first TRP may transmit, to the UE, a third CSI-RS via a third beam. In the multi-TRP configuration, a second TRP may transmit, to the UE, a fourth CSI-RS via a fourth beam. The second TRP may transmit, to the UE, a fifth CSI-RS via a fifth beam. The second TRP may transmit, to the UE, a sixth CSI-RS via a sixth beam. The UE may transmit, to the first TRP, separate CSI reports for each of the first CSI-RS received via the first beam, the second CSI-RS received via the second beam, and the third CSI-RS received via the third beam. Similarly, the UE may transmit, to the second TRP, separate CSI reports for each of the fourth CSI-RS received via the fourth beam, the fifth CSI-RS received via the fifth beam, and the sixth CSI-RS received via the sixth beam.

The UE may transmit multiple CSI reports in a physical uplink control channel (PUCCH) based at least in part on multiple CSI-RSs received from multiple TRPs. For example, the UE may transmit a separate CSI report for each beam and for each TRP. The multiple CSI reports transmitted in the PUCCH by the UE may result in a relatively high signaling overhead. The multiple CSI reports may be transmitted via an uplink control information (UCI) payload, and a probability of a lost CSI report may be relatively high due to the UCI payload being relatively large due to the multiple CSI reports (e.g., the per beam and per TRP CSI reports). As a result, to achieve relatively fast and detailed CSI reporting for each beam and for each TRP, a resulting signaling overhead may be prohibitive for the UE and the multiple TRPs.

As indicated above, FIG. 3 is provided as an example. Other examples may differ from what is described with regard to FIG. 3 .

In various aspects of techniques and apparatuses described herein, a UE may receive, from a first TRP, a first CSI-RS associated with the first TRP and a first beam. The UE may receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP. The second CSI-RS may be associated with a second beam. The UE may transmit, to the first TRP or the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. The UE may transmit the indication of the delta value, rather than transmitting separate CSI reports associated with the first CSI-RS and the second CSI-RS, thereby reducing signaling overhead at the UE.

In some aspects, the UE may transmit indications of delta values of certain measurements, rather than transmitting separate CSI reports per TRP and per beam, which may reduce signaling overhead associated with measurement reporting. In some aspects, the UE may report only certain delta values. For example, the UE may report delta values across a whole bandwidth part (BWP) for purposes of detecting a beam blocking.

FIG. 4 is a diagram illustrating an example 400 associated with measurement reporting with delta values, in accordance with the present disclosure. As shown in FIG. 4 , example 400 includes communication between a UE (e.g., UE 120) and TRP(s) (e.g., a first TRP and a second TRP) associated with one or more base stations (e.g., base station 110). In some aspects, the UE and the TRP(s) may be included in a wireless network, such as wireless network 100.

As shown by reference number 402, the UE may receive, from a first TRP, a first CSI-RS associated with the first TRP and a first beam. The first TRP may be associated with a first base station.

As shown by reference number 404, the UE may receive, from the first TRP or the second TRP, a second CSI-RS associated with the first TRP or the second TRP. The second CSI-RS may be associated with a second beam, which may be different than the first beam. The second TRP may be associated with the first base station or a second base station. In some aspects, the UE may receive multiple CSI-RSs from the second TRP, where each CSI-RS may be associated with a different beam.

In some aspects, the UE may receive a plurality of CSI-RSs from different TRPs, such as the first TRP and/or the second TRP, and with different beams. Each CSI-RS received at the UE may be associated with a specific TRP and a specific beam.

As shown by reference number 406, the UE may transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. The UE may perform the measurement associated with the first CSI-RS and may perform the measurement associated with the second CSI-RS. The UE may further determine the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS.

In some aspects, the delta value may be a delta value between an RSRP associated with the first CSI-RS and an RSRP associated with the second CSI-RS. In some aspects, the delta value may be a delta value between an RSRQ associated with the first CSI-RS and an RSRQ associated with the second CSI-RS. In some aspects, the delta value may be a delta value between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS. In some aspects, the delta value may be a delta value between an MCS associated with the first CSI-RS and an MCS associated with the second CSI-RS. In some aspects, the delta value may be a delta value between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS. In some aspects, the delta value may correspond to a delta of mean values (e.g., mean RSRP) associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS. In some aspects, the delta value may correspond to a delta of standard deviation values or variants associated with the measurement of the first CSI-RS and standard deviation values or variants associated with the measurement of the second CSI-RS. In some aspects, the delta value may correspond to a delta of highest/lowest values associated with the measurement of the first CSI-RS and highest/lowest values associated with the measurement of the second CSI-RS. In some aspects, the delta value may correspond to a delta between measurements associated with DMRSs instead of CSI-RSs.

In some aspects, the UE may perform delta value reporting, which may involve indicating delta values between measurements (e.g., RSRP, RSRQ, and so on) from different TRPs (e.g., the first TRP and the second TRP) and different beams (e.g., the first beam and the second beam).

In some aspects, the UE may transmit, to the first TRP, an indication of a measurement of the first CSI-RS, where a link associated with the first CSI-RS may correspond to a reference link, and the delta value may be relative to the measurement of the first CSI-RS associated with the reference link. In other words, the UE may perform a measurement entity reporting (e.g., an RSRP or RSRQ measurement reporting) of a single TRP associated with a particular beam, which may correspond to the reference link. In this case, the UE may report delta values corresponding to remaining TRPs and/or beams, and the delta values may be relative to the measurement of the single TRP associated with the particular beam.

As an example, the measurement of the single TRP associated with the particular beam may be an absolute value, a first delta value associated with another TRP and/or beam may indicate a difference with the absolute value, a second data value associated with another TRP and/or beam may indicate a difference with the absolute value, and so on. Reporting the delta values instead of separate CSI reports with absolute measurement values may reduce the signaling overhead at the UE.

As an example, the first TRP may transmit CSI-RSs associated with the first beam, the second beam, and a third beam, respectively, and the second TRP may transmit CSI-RSs associated with a fourth beam, a fifth beam, and a sixth beam, respectively. The UE may transmit a measurement to the first TRP for the first beam, which may serve as a reference link. The UE may transmit a delta value to the first TRP for the second beam, which may be a relative value in relation to the measurement associated with the first TRP and the first beam. The UE may transmit a delta value to the first TRP for the third beam, which may be a relative value in relation to the measurement associated with the first TRP and the first beam. The UE may transmit a delta value to the second TRP for the fourth beam, which may be a relative value in relation to the measurement associated with the first TRP and the first beam. The UE may transmit a delta value to the second TRP for the fifth beam, which may be a relative value in relation to the measurement associated with the first TRP and the first beam. The UE may transmit a delta value to the second TRP for the sixth beam, which may be a relative value in relation to the measurement associated with the first TRP and the first beam.

In some aspects, the UE may not transmit the indication of the measurement of the first CSI-RS associated with the reference link, and the UE may only transmit the indication of the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS. In this case, the UE may only report delta values corresponding to remaining TRPs and/or beams.

In some aspects, the UE may determine an inferred measurement value associated with a downlink channel, such as a physical downlink shared channel (PDSCH) or a physical downlink control channel (PDCCH), between the UE and the first TRP or the second TRP. The downlink channel may be associated with a transmission configuration indicator (TCI) state, a subband, and/or an MCS. The inferred measurement value associated with the downlink channel may correspond to an implicit reference link between the UE and the first TRP or the second TRP. The UE may not actually report the inferred measurement value. The delta value may be relative to the inferred measurement value associated with the downlink channel between the UE and the first TRP or the second TRP.

In some aspects, the UE may use the delta value to add or remove a beam for the UE. In other words, the UE may add or remove the beam for the UE based at least in part on the delta value. For example, the UE may determine the delta values corresponding to remaining TRPs and/or beams. The delta values may indicate relative strengths of beams associated with the CSI-RSs. The UE may determine, based at least in part on the delta values, beams that are relatively strong or relatively weak, and the UE may add or remove certain beams accordingly in a next beam allocation. The UE may add certain beams based at least in part on corresponding delta values that indicate a relatively strong link, while the UE may remove certain beams based at least in part on corresponding delta values that indicate a relatively weak link. In this case, the UE may use the delta values without use of the measurement associated with the reference link, as the UE may use the relative delta values in determining which beams for the UE are suitable or not suitable. For example, delta values that satisfy a certain threshold may indicate that corresponding beams for the UE are suitable, whereas delta values that do not satisfy the certain threshold may indicate that corresponding beams for the UE are not suitable.

As indicated above, FIG. 4 is provided as an example. Other examples may differ from what is described with regard to FIG. 4 .

FIG. 5 is a diagram illustrating an example process 500 performed, for example, by a UE, in accordance with the present disclosure. Example process 500 is an example where the UE (e.g., UE 120) performs operations associated with measurement reporting with delta values.

As shown in FIG. 5 , in some aspects, process 500 may include receiving, from a first TRP, a first CSI-RS associated with the first TRP and a first beam (block 510). For example, the UE (e.g., using reception component 702, depicted in FIG. 7 ) may receive, from a first TRP, a first CSI-RS associated with the first TRP and a first beam, as described above.

As further shown in FIG. 5 , in some aspects, process 500 may include receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, and the second CSI-RS is associated with a second beam (block 520). For example, the UE (e.g., using reception component 702, depicted in FIG. 7 ) may receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, and the second CSI-RS is associated with a second beam, as described above.

As further shown in FIG. 5 , in some aspects, process 500 may include transmitting, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS (block 530). For example, the UE (e.g., using transmission component 704, depicted in FIG. 7 ) may transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS, as described above.

Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.

In a second aspect, alone or in combination with the first aspect, process 500 includes adding or removing beams for the UE based at least in part on the delta value.

In a third aspect, alone or in combination with one or more of the first and second aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an RSRP associated with the first CSI-RS and an RSRP associated with the second CSI-RS.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an RSRQ associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an SINR associated with the first CSI-RS and an SINR associated with the second CSI-RS.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an MCS associated with the first CSI-RS and an MCS associated with the second CSI-RS.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an LLR associated with the first CSI-RS and an LLR associated with the second CSI-RS.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the delta value corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the delta value corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the delta value corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, process 500 includes transmitting, to the first TRP, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.

Although FIG. 5 shows example blocks of process 500, in some aspects, process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in FIG. 5 . Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.

FIG. 6 is a diagram illustrating an example process 600 performed, for example, by a first TRP, in accordance with the present disclosure. Example process 600 is an example where the first TRP (e.g., base station 110) performs operations associated with measurement reporting with delta values.

As shown in FIG. 6 , in some aspects, process 600 may include transmitting, to a UE, a first CSI-RS associated with the first TRP and a first beam (block 610). For example, the first TRP (e.g., using transmission component 804, depicted in FIG. 8 ) may transmit, to a UE, a first CSI-RS associated with the first TRP and a first beam, as described above.

As further shown in FIG. 6 , in some aspects, process 600 may include receiving, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam (block 620). For example, the first TRP (e.g., using reception component 802, depicted in FIG. 8 ) may receive, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam, as described above.

Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.

In a second aspect, alone or in combination with the first aspect, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an RSRP associated with the first CSI-RS and an RSRP associated with the second CSI-RS.

In a third aspect, alone or in combination with one or more of the first and second aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an RSRQ associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an SINR associated with the first CSI-RS and an SINR associated with the second CSI-RS.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an MCS associated with the first CSI-RS and an MCS associated with the second CSI-RS.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between an LLR associated with the first CSI-RS and an LLR associated with the second CSI-RS.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the delta value corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the delta value corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the delta value corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, process 600 includes receiving, from the UE, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.

Although FIG. 6 shows example blocks of process 600, in some aspects, process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in FIG. 6 . Additionally, or alternatively, two or more of the blocks of process 600 may be performed in parallel.

FIG. 7 is a diagram of an example apparatus 700 for wireless communication. The apparatus 700 may be a UE, or a UE may include the apparatus 700. In some aspects, the apparatus 700 includes a reception component 702 and a transmission component 704, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus 700 may communicate with another apparatus 706 (such as a UE, a base station, or another wireless communication device) using the reception component 702 and the transmission component 704.

In some aspects, the apparatus 700 may be configured to perform one or more operations described herein in connection with FIG. 4 . Additionally, or alternatively, the apparatus 700 may be configured to perform one or more processes described herein, such as process 500 of FIG. 5 . In some aspects, the apparatus 700 and/or one or more components shown in FIG. 7 may include one or more components of the UE described in connection with FIG. 2 . Additionally, or alternatively, one or more components shown in FIG. 7 may be implemented within one or more components described in connection with FIG. 2 . Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The reception component 702 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 706. The reception component 702 may provide received communications to one or more other components of the apparatus 700. In some aspects, the reception component 702 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus 700. In some aspects, the reception component 702 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with FIG. 2 .

The transmission component 704 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 706. In some aspects, one or more other components of the apparatus 700 may generate communications and may provide the generated communications to the transmission component 704 for transmission to the apparatus 706. In some aspects, the transmission component 704 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus 706. In some aspects, the transmission component 704 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with FIG. 2 . In some aspects, the transmission component 704 may be co-located with the reception component 702 in a transceiver.

The reception component 702 (or communication manager 140, as described in connection with FIG. 1 ) may receive, from a first TRP, a first CSI-RS associated with the first TRP and a first beam. The reception component 702 (or communication manager 140, as described in connection with FIG. 1 ) may receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam. The transmission component 704 may transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.

The number and arrangement of components shown in FIG. 7 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in FIG. 7 . Furthermore, two or more components shown in FIG. 7 may be implemented within a single component, or a single component shown in FIG. 7 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in FIG. 7 may perform one or more functions described as being performed by another set of components shown in FIG. 7 .

FIG. 8 is a diagram of an example apparatus 800 for wireless communication. The apparatus 800 may be a first TRP, or a first TRP may include the apparatus 800. In some aspects, the apparatus 800 includes a reception component 802 and a transmission component 804, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus 800 may communicate with another apparatus 806 (such as a UE, a base station, or another wireless communication device) using the reception component 802 and the transmission component 804.

In some aspects, the apparatus 800 may be configured to perform one or more operations described herein in connection with FIG. 4 . Additionally, or alternatively, the apparatus 800 may be configured to perform one or more processes described herein, such as process 600 of FIG. 6 . In some aspects, the apparatus 800 and/or one or more components shown in FIG. 8 may include one or more components of the first TRP described in connection with FIG. 2 . Additionally, or alternatively, one or more components shown in FIG. 8 may be implemented within one or more components described in connection with FIG. 2 . Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The reception component 802 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 806. The reception component 802 may provide received communications to one or more other components of the apparatus 800. In some aspects, the reception component 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus 800. In some aspects, the reception component 802 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the first TRP described in connection with FIG. 2 .

The transmission component 804 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 806. In some aspects, one or more other components of the apparatus 800 may generate communications and may provide the generated communications to the transmission component 804 for transmission to the apparatus 806. In some aspects, the transmission component 804 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus 806. In some aspects, the transmission component 804 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the first TRP described in connection with FIG. 2 . In some aspects, the transmission component 804 may be co-located with the reception component 802 in a transceiver.

The transmission component 804 (or communication manager 150, as described in connection with FIG. 1 ) may transmit, to a UE, a first CSI-RS associated with the first TRP and a first beam. The reception component 802 (or communication manager 150, as described in connection with FIG. 1 ) may receive, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.

The number and arrangement of components shown in FIG. 8 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in FIG. 8 . Furthermore, two or more components shown in FIG. 8 may be implemented within a single component, or a single component shown in FIG. 8 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in FIG. 8 may perform one or more functions described as being performed by another set of components shown in FIG. 8 .

FIG. 9 is a diagram illustrating an example 900 of a disaggregated base station architecture, in accordance with the present disclosure.

Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, or a network equipment, such as a base station (BS, e.g., base station 110), or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture. For example, a BS (such as a Node B (NB), eNB, NR BS, 5G NB, access point (AP), a TRP, a cell, or the like) may be implemented as an aggregated base station (also known as a standalone BS or a monolithic BS) or a disaggregated base station.

An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU also can be implemented as virtual units (e.g., a virtual centralized unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU)).

Base station-type operation or network design may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an IAB network, an O-RAN (such as the network configuration sponsored by the O-RAN Alliance), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station, or disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit.

The disaggregated base station architecture shown in FIG. 9 may include one or more CUs 910 that can communicate directly with a core network 920 via a backhaul link, or indirectly with the core network 920 through one or more disaggregated base station units (such as a Near-RT RIC 925 via an E2 link, or a Non-RT RIC 915 associated with a Service Management and Orchestration (SMO) Framework 905, or both). A CU 910 may communicate with one or more DUs 930 via respective midhaul links, such as an F1 interface. The DUs 930 may communicate with one or more RUs 940 via respective fronthaul links. The RUs 940 may communicate with respective UEs 120 via one or more radio frequency (RF) access links. In some implementations, the UE 120 may be simultaneously served by multiple RUs 940.

Each of the units (e.g., the CUs 910, the DUs 930, the RUs 940), as well as the Near-RT RICs 925, the Non-RT RICs 915, and the SMO Framework 905, may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as an RF transceiver), configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.

In some aspects, the CU 910 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 910. The CU 910 may be configured to handle user plane functionality (e.g., Central Unit-User Plane (CU-UP)), control plane functionality (e.g., Central Unit-Control Plane (CU-CP)), or a combination thereof. In some implementations, the CU 910 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 910 can be implemented to communicate with the DU 930, as necessary, for network control and signaling.

The DU 930 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 940. In some aspects, the DU 930 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3GPP. In some aspects, the DU 930 may further host one or more low-PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 930, or with the control functions hosted by the CU 910.

Lower-layer functionality can be implemented by one or more RUs 940. In some deployments, an RU 940, controlled by a DU 930, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like), or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU(s) 940 can be implemented to handle over the air (OTA) communication with one or more UEs 120. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU(s) 940 can be controlled by the corresponding DU 930. In some scenarios, this configuration can enable the DU(s) 930 and the CU 910 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

The SMO Framework 905 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 905 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO Framework 905 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 990) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements can include, but are not limited to, CUs 910, DUs 930, RUs 940 and Near-RT RICs 925. In some implementations, the SMO Framework 905 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 911, via an O1 interface. Additionally, in some implementations, the SMO Framework 905 can communicate directly with one or more RUs 940 via an O1 interface. The SMO Framework 905 also may include a Non-RT RIC 915 configured to support functionality of the SMO Framework 905.

The Non-RT RIC 915 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC 925. The Non-RT RIC 915 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 925. The Near-RT RIC 925 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 910, one or more DUs 930, or both, as well as an O-eNB, with the Near-RT RIC 925.

In some implementations, to generate AI/ML models to be deployed in the Near-RT RIC 925, the Non-RT RIC 915 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 925 and may be received at the SMO Framework 905 or the Non-RT RIC 915 from non-network data sources or from network functions. In some examples, the Non-RT RIC 915 or the Near-RT RIC 925 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 915 may monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework 905 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies).

As indicated above, FIG. 9 is provided as an example. Other examples may differ from what is described with regard to FIG. 9 .

The following provides an overview of some Aspects of the present disclosure:

Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmitting, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.

Aspect 2: The method of Aspect 1, further comprising: transmitting, to the first TRP, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.

Aspect 3: The method of any of Aspects 1 through 2, wherein the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.

Aspect 4: The method of any of Aspects 1 through 3, further comprising: adding or removing beams for the UE based at least in part on the delta value.

Aspect 5: The method of any of Aspects 1 through 4, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.

Aspect 6: The method of any of Aspects 1 through 5, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received quality (RSRQ) associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.

Aspect 7: The method of any of Aspects 1 through 6, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS.

Aspect 8: The method of any of Aspects 1 through 7, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a modulation and coding scheme (MCS) associated with the first CSI-RS and an MCS associated with the second CSI-RS.

Aspect 9: The method of any of Aspects 1 through 8, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS.

Aspect 10: The method of any of Aspects 1 through 9, wherein the delta value corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.

Aspect 11: The method of any of Aspects 1 through 10, wherein the delta value corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.

Aspect 12: The method of any of Aspects 1 through 11, wherein the delta value corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.

Aspect 13: A method of wireless communication performed by a first transmit-receive point (TRP), comprising: transmitting, to a user equipment (UE), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; and receiving, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.

Aspect 14: The method of Aspect 13, further comprising: receiving, from the UE, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.

Aspect 15: The method of any of Aspects 13 through 14, wherein the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.

Aspect 16: The method of any of Aspects 13 through 15, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.

Aspect 17: The method of any of Aspects 13 through 16, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received quality (RSRQ) associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.

Aspect 18: The method of any of Aspects 13 through 17, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS.

Aspect 19: The method of any of Aspects 13 through 18, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a modulation and coding scheme (MCS) associated with the first CSI-RS and an MCS associated with the second CSI-RS.

Aspect 20: The method of any of Aspects 13 through 19, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS.

Aspect 21: The method of any of Aspects 13 through 20, wherein the delta value corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.

Aspect 22: The method of any of Aspects 13 through 21, wherein the delta value corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.

Aspect 23: The method of any of Aspects 13 through 22, wherein the delta value corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.

Aspect 24: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 1-12.

Aspect 25: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of Aspects 1-12.

Aspect 26: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-12.

Aspect 27: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1-12.

Aspect 28: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-12.

Aspect 29: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 13-23.

Aspect 30: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of Aspects 13-23.

Aspect 31: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 13-23.

Aspect 32: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 13-23.

Aspect 33: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 13-23.

The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.

As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiples of the same element (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B). Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or,” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of”). 

What is claimed is:
 1. An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and one or more processors, coupled to the memory, configured to: receive, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmit, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.
 2. The apparatus of claim 1, wherein the one or more processors are further configured to transmit, to the first TRP, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.
 3. The apparatus of claim 1, wherein the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.
 4. The apparatus of claim 1, wherein the one or more processors are further configured to: add or remove beams for the UE based at least in part on the delta value.
 5. The apparatus of claim 1, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.
 6. The apparatus of claim 1, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received quality (RSRQ) associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.
 7. The apparatus of claim 1, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS.
 8. The apparatus of claim 1, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a modulation and coding scheme (MCS) associated with the first CSI-RS and an MCS associated with the second CSI-RS.
 9. The apparatus of claim 1, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS.
 10. The apparatus of claim 1, wherein the delta value corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.
 11. The apparatus of claim 1, wherein the delta value corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.
 12. The apparatus of claim 1, wherein the delta value corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.
 13. An apparatus for wireless communication at a first transmit-receive point (TRP), comprising: a memory; and one or more processors, coupled to the memory, configured to: transmit, to a user equipment (UE), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; and receive, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.
 14. The apparatus of claim 13, wherein the one or more processors are further configured to receive, from the UE, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.
 15. The apparatus of claim 13, wherein the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.
 16. The apparatus of claim 13, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.
 17. The apparatus of claim 13, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received quality (RSRQ) associated with the first CSI-RS and an RSRQ associated with the second CSI-RS.
 18. The apparatus of claim 13, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a signal-to-interference-and-noise ratio (SINR) associated with the first CSI-RS and an SINR associated with the second CSI-RS.
 19. The apparatus of claim 13, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a modulation and coding scheme (MCS) associated with the first CSI-RS and an MCS associated with the second CSI-RS.
 20. The apparatus of claim 13, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a log likelihood ratio (LLR) associated with the first CSI-RS and an LLR associated with the second CSI-RS.
 21. The apparatus of claim 13, wherein the delta value corresponds to a delta of mean values associated with the measurement of the first CSI-RS and mean values associated with the measurement of the second CSI-RS.
 22. The apparatus of claim 13, wherein the delta value corresponds to a delta of standard deviation values associated with the measurement of the first CSI-RS and standard deviation values associated with the measurement of the second CSI-RS.
 23. The apparatus of claim 13, wherein the delta value corresponds to a delta of highest or lowest values associated with the measurement of the first CSI-RS and highest or lowest values associated with the measurement of the second CSI-RS.
 24. A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; receiving, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam; and transmitting, to the first TRP or to the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS.
 25. The method of claim 24, further comprising: transmitting, to the first TRP, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.
 26. The method of claim 24, wherein the delta value is relative to an inferred measurement associated with a downlink channel between the UE and the first TRP or the second TRP.
 27. The method of claim 24, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS.
 28. A method of wireless communication performed by a first transmit-receive point (TRP), comprising: transmitting, to a user equipment (UE), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam; and receiving, from the UE, an indication of a delta value between a measurement of the first CSI-RS and a measurement of a second CSI-RS, wherein the second CSI-RS is associated with the first TRP or a second TRP, and the second CSI-RS is associated with a second beam.
 29. The method of claim 28, further comprising: receiving, from the UE, an indication of a measurement of the first CSI-RS, wherein a link associated with the first CSI-RS corresponds to a reference link, and the delta value is relative to the measurement of the first CSI-RS associated with the reference link.
 30. The method of claim 28, wherein the delta value between the measurement of the first CSI-RS and the measurement of the second CSI-RS is a delta value between a reference signal received power (RSRP) associated with the first CSI-RS and an RSRP associated with the second CSI-RS. 